So I was ****ing around in SMV, and I came across an invisible wall... this invisible wall was around BT, and as you all know when theres an invisible wall there, theres something cool that your not supposed to see there
So... start here...
Now go to your left, land on the ledge that is visible in the top left part of the screenshot. Now get to here :
Now your going to want to blink, or auto-unstuck, either works. I found it to work best if your character is parralel to the ledge, and you should blink right through the wall.
Enjoy Some spoilers as to whats inside